You might check out VidCast at http://dabble.me - it has a bookmarklet compatible with Twit.tv making your experience with finding a video on Twit.tv & casting it to your TV a bit more streamlined.
Thanks, got that bookmarked. It works except for the live stream, which I found casts well from the Twit Cast Android app. So between these two, Chromecasting is working out well for me.